The producers of The Munsters figured that The Addams Family would be over the top and so originally determined that their show should be likewise. But, as said before, it was Yvonne DeCarlo who caused it to change course. (And, ironically, the TV show did not mirror the comic series Addams Family as presented in print; the movies were far more correct in that aspect.)
And I also loved many of the one-liners from The Munsters, especially between Herman and Grandpa, but from the other characters as well, which exemplified how it "crossed" between the "normal" and the "bizarre."
(Paraphrasing here.)
Grandpa: Two drivers arrive at an intersection at the same time. Who goes first?
Herman: The one with the bigger car?
Grandpa. No, no, no. That's only in California.
Lilly: Grandpa, don't you dare change yourself into a wolf again. That last time you did that you ended up in Kansas City with that police dog.
Herman: (Lilly and Herman think that it is time for Eddie to have "the talk" - something the censors had a bit of difficulty with.) Lilly, you do it! I remember when I found out that the whole thing about the bees was more than just making honey, I fainted.
Lilly: No, Herman, it's the father's responsibility. Someone like you who faithfully watches "My Three Sons" knows that.
Herman: All right, I'll do it. But Donna Reed handles these kinds of things on her show, you know.
Gerard